Author: Daniel Baumann <daniel.baumann@progress-linux.org>
Description: Move unified extensions button to the right in navbar.

diff -Naurp firefox-esr.orig/browser/themes/shared/toolbarbutton-icons.css firefox-esr/browser/themes/shared/toolbarbutton-icons.css
--- firefox-esr.orig/browser/themes/shared/toolbarbutton-icons.css
+++ firefox-esr/browser/themes/shared/toolbarbutton-icons.css
@@ -373,6 +373,7 @@ toolbar[brighttext]:-moz-lwtheme {
 }
 
 #unified-extensions-button {
+  order: 1 !important;
   list-style-image: url("chrome://mozapps/skin/extensions/extension.svg");
 }